diff --git a/example/ex1/ex1.cpp b/example/ex1/ex1.cpp
index 4b138a50..cc6ee8cb 100644
--- a/example/ex1/ex1.cpp
+++ b/example/ex1/ex1.cpp
@@ -43,7 +43,7 @@ main () {
     static_assert(a.scale() == 0.625);
     static_assert(a.abbrev() == flatstring("km.min^-2"));
 
-    constexpr auto a2 = a.rescale<(su::meter / (su::second * su::second))>();
+    constexpr auto a2 = a.rescale_ext<(su::meter / (su::second * su::second))>();
 
     cerr << "d.t^-2: " << a2 << endl;
 
diff --git a/example/ex2/ex2.cpp b/example/ex2/ex2.cpp
index 936704d9..f2116570 100644
--- a/example/ex2/ex2.cpp
+++ b/example/ex2/ex2.cpp
@@ -24,7 +24,7 @@ main () {
          << ", d.t^-2: " << a
          << endl;
 
-    constexpr auto a2 = a.template rescale<su::meter / (su::second * su::second)>();
+    constexpr auto a2 = a.rescale_ext<su::meter / (su::second * su::second)>();
 
     static_assert(a2.abbrev() == flatstring("m.s^-2"));
 
diff --git a/include/xo/unit/quantity.hpp b/include/xo/unit/quantity.hpp
index d17d7624..25558491 100644
--- a/include/xo/unit/quantity.hpp
+++ b/include/xo/unit/quantity.hpp
@@ -76,7 +76,7 @@ namespace xo {
 
             template <scaled_unit<Int> ScaledUnit2>
             constexpr
-            auto rescale() const {
+            auto rescale_ext() const {
                 /* conversion factor from .unit -> unit2*/
                 auto rr = detail::su_ratio<ratio_int_type,
                                            ratio_int2x_type>(NaturalUnit, ScaledUnit2.natural_unit_);